Questions about getting data, files, images etc. from various formats into a form that can be read, tranformed and manipulated by Mathematica

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13
votes
1answer
303 views

How to use Get on a folder

In the documentation for Get it says: If the file found by <<name is a directory, the Wolfram Language will try to ...
1
vote
0answers
49 views

Can I import (and repair) damaged GIS shape files?

Five GIS shape files are available online at http://www.utahcounty.gov/OnlineServices/maps/DataLayers.asp. Mathematica 10 imports 4 of the 5 files just fine (in the sense that, after download, ...
6
votes
1answer
409 views

How to correctly import data zipped with the “deflate” algorithm?

I'm writing an importer for the GIFTI file format. The details of the format are not particularly important, but the basic idea is that it is a relatively simple XML file which includes binary arrays ...
1
vote
0answers
79 views

import file from directory using sftp

I want to import a file from a directory on a ftp using sftp. I'm not sure how the command looks, but here is what I have tried (based on this older post): ...
1
vote
1answer
154 views

A bug won't let me import JSON files

I have been working on a project and I have been using JSON to build some networks, the code I use is: ...
2
votes
1answer
104 views

How can I run my API on an image?

I've built an API that takes a url of an image as an argument. Using Import[] I can easily call my API on any url and get the results... but I need to run it on an ...
3
votes
2answers
103 views

Most efficient way of splitting a file into length-prefixed blocks

Let's say I have a really big file (>100MB) that consists of length-prefixed blocks, i.e. the first byte of each byte block indicates the length of the rest of the block. This is a simplified example ...
1
vote
1answer
115 views

Importing, sorting and exporting lists

I have several TSV lists (.txt) of something like 2000*2000 numerics (e.g. 1.8645) to import ...
0
votes
1answer
92 views

Having trouble displaying imported Excel regression data [closed]

The plot points and residual lines are not showing, hard-coded data works, and imported data does do something, just not what its supposed to Is the table or the plot range the wrong size? I can't ...
2
votes
1answer
87 views

Export and Import a list of graphs?

I want to export a list of graphs that come as output to my program. However, I tried exporting all the graphs as graphs using Map and an Export statement with "graph.gml" statement, but got an error. ...
0
votes
2answers
62 views

import string to data

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0
votes
0answers
56 views

How to import (from a table file) only rows with a specific element in a given position using Import?

I have a large file containing a table. To be specific, the table columns are aligned by spaces, and the rows are terminated by newlines. I want to import only specific rows from this table. For ...
1
vote
1answer
51 views

Dynamic check box with import!

Here what i am trying to do: I have a list of the names of excel files, for example s={"red carpet.csv","red box.csv","black carpet.csv","black box.csv"}; i am ...
3
votes
2answers
307 views

Equivalent of Matlab's uigetfile in Mathematica

I was wondering if there an equivalent of the "uigetfile" Matlab function to use it in Mathematica. To be more precise, I want to read many Excel files and I don't want to type a static path; ...
2
votes
2answers
131 views

How to rearrange structure and type of an imported dataset?

I have a bigger dataset imported from Excel. Its elements have a form of {time, data}. Day is irrelevant and I would like to have the time in decimal form e.g. 10:30 is 10.5 ...
0
votes
2answers
300 views

Import table from txt file with specific rows

I have a .txt file written as 1 2 3 4 5 6 7 8 9 10 11 12 I would like to import it as three matrices according to the rows. I used b = Import["d:\am.txt", {"Table", Range[1, 2]}] Seems it ...
2
votes
1answer
328 views

How can I download images from Instagram and Twitter?

The new function ServiceExecute seems to suggest the ability to download images containing a specific hashtags. Can anyone get this to work?
0
votes
0answers
160 views

Set first line in CSV as header in mathematica list

New to stackexchange. Need some help with mathematica - also new to this!. I have a CSV file with 80 something columns and 6000 something rows = 500,000ish elements in total. I am trying to import ...
0
votes
1answer
89 views

reading data, one number at a time, from file to be used in a formula

First off let me say that I am a total nube. I saw some examples of answers "close" to my question but I did not understand them :-( I want to read individual numbers in from a text file and have ...
0
votes
2answers
1k views

Import a given column from an excel file? [closed]

It seems that I can get the first column of excle data, say "test.xls", if I know the total length... ...
0
votes
1answer
71 views

How to get an elements of given class that generated by javascripts

I want to get the number of total pages of a given search resluts of this site: http://srh.bankofchina.com/search/whpj/searchen.jsp, e.g., from 2015-1-12 to 2015-1-13 the currency of USD by the ...
3
votes
1answer
112 views

Local evaluation works, CloudDeploy did not work

I a playing around with my programming cloud account. What I have found, interactive functions often are not working because there are several details that are not implemented into the cloud. So I ...
0
votes
0answers
85 views

ViewPoint: Saving coordinates in a text file

How should I save (Export?), all coordinates of the ViewPoint, in a text file when I rotate the ...
4
votes
1answer
350 views

Using the variable in the MATLAB workspace using MATLink or any other packages

I have a program in MATLAB and after I run the program, I get some results in MATLAB's workspace. Now, I need to use these results in Mathematica. What I currently do is that I save the workspace as a ...
1
vote
1answer
103 views

Importing a text file

I have a *.txt file with values like so: 0 2 4 3 4 2 the position in this huge *.txt ...
3
votes
0answers
70 views

Importing sobj sage objects?

I am working with a sage-math object. With some older versions of Mathematica it was possible to send data directly but the function doesn't work with Mathematica 9. What are my options to import a ...
2
votes
3answers
142 views

Import Data using selection criteria

I imported a file (text and numbers) and made constructed this. e[[1,All,{1,2,3,4,6}]] Column 1 is the name of the state. How can I get a subset of this where, say Column 1 is not equal to "New ...
1
vote
0answers
361 views

Import/Export a FIT file, Fitness file created by Garmin GPS's and others

A FIT file is a binary replacement for GPX and TCX text files containing GPS and fitness data (heart monitors, etc.). Mathematica reads GPX and TCX files and represents them as XML. I would like to ...
2
votes
1answer
184 views

How to get a audio file's duration time in Mathematica?

I have a *.avi file and if I want to know the file's duration time: I can use this code to get the result: Import["test.avi", "Duration"] or the code to get the ...
8
votes
1answer
126 views

Is it possible to move .mx file from one server to other?

I have mathematica file in one server along with .mx file. Is there any way to move the .mx file from one server to other such ...
3
votes
3answers
986 views

Import data from first/last 100 rows of a file

If one wants import data from the first three rows of a file "myfile.data", one can use the command Import["myfile.data",{"Data",{1,2,3},All}]; However, if I ...
1
vote
2answers
150 views

Table operation after export and import of data does not give me the same result

If I create a table of this kind: (m1 = Table[{RandomInteger[], RandomInteger[{1, 5}, {3}]}, {i, 1, 5}]) // MatrixForm which looks like I know how to pick ...
1
vote
1answer
83 views

List Manipulation and Removing Cases

I've imported a large data set, manually removing headers in the .rtf file where it originates. However, when I import this data, I receive this output: ...
5
votes
0answers
260 views

ImportString JSON possible bug

My problem is when I catch up some json output of whatever method and process it with ImportString[%, "JSON"], The first time ...
1
vote
1answer
73 views

Performance of Extract-Transform operations

I'm doing simple data analysis, where I load some "date-time" data from a file. The data is a simple list, but there are 41,000 values in total. Here's a short sample: ...
0
votes
1answer
69 views

Elegant ways of solving this file batching task

There are a batch of data files in a folder (dir = "D:\\Documents\\datadir"), each of which consists of a list of data items, one per line. Each data item is a pair ...
1
vote
2answers
163 views

Save file from URL using mathematica

Is there an easy way to download and save a .zip file from a URL to my computer through Mathematica? I am trying to develop an auto-update function for a mathematica package that is distributed via ...
0
votes
2answers
110 views

File Handling. How to save the progress in a file?

Assuming I already have the file created. I have a programme that,returns an output, in our case number. I want Mathematica to save this number in a file, together with results saved from previous ...
9
votes
1answer
283 views

How to use RunProcess to import external function?

I have a functions written in an external language called GO. How can I quickly load them into the kernel for use as Mathematica functions? The two ways I've tried are with MathLink and LibraryLink ...
1
vote
0answers
82 views

Import a web page with $\LaTeX$ code including images (png or other)

To be brief; I would like to import a web page, so I use Import["http://fabricebaudoin.wordpress.com/2012/10/25/lecture-32-the-malliavin-derivative/"]; which ...
3
votes
1answer
378 views

Efficiently reading CSV with ReadList

I have a large CSV file (~1gb) with mixed data. Basically with strings and integers. It takes very long to import this whole dataset with Import[] so I would like ...
4
votes
1answer
404 views

CSV vs XLS for import

I need to import data from various database sources. At the moment I plan on importing files via a CSV file or XLS. All the data if in XLS would be on one sheet (notebook). Are there any advantages ...
19
votes
1answer
2k views

How to programmatically extract mathematical formulas from Word with Mathematica 9?

I have a bunch of(1000+) Microsoft Word document in .Docx format. How can I programmatically extract the mathematical formulas from MS Word using Mathematica 9? This is what example looks like (or ...
1
vote
3answers
473 views

How to import files with headers?

R has excellent header supports such as read.table with header options. I don't want to mess up with text-processing or stream-processing. I am looking for a similar tool as in R because it saves a ...
7
votes
1answer
297 views

How to make Import recognize a new file extension?

I've written an import converter for a custom file format, and it all seems to be working as expected, except for the fallback behavior with no arguments: ...
1
vote
1answer
66 views

Importing file as a string causes a puzzle

I generate simple txt file and import it as follows: a = Import["binary.txt"]; b = Import["binary.txt", "String"]. It appears then that lengths of imported strings ...
2
votes
2answers
143 views

Why can't I import a file in the init.m file?

I would like to have some data read in every time the kernel starts, but it doesn't seem to work. Say I have a CSV file I want to have read in, for example I use: ...
5
votes
1answer
230 views

HDF5 and complex numbers

I "Export" an array with complex numbers with HDF5 format. When I "Import" it, I only get the real part. Simple example: ...
1
vote
0answers
96 views

SemanticImport::unexpinvaliderr error when using trial version

I am trying to use SemanticImport for a personal experiment. I can correctly import a tsv file from a path, but if I change ...